Quinupristin/dalfopristin will raise the amount or outcome of diazepam by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check. Will it impact my contraception? Diazepam will likely not have an effect on any sort of contraception, including the combined pill and emergency contraception. diazepam will increase the amount or influence of tazemetostat http://benesdin